Television – Monitoring – testing – or measuring
Reexamination Certificate
2008-07-29
2008-07-29
Ometz, David (Department: 2622)
Television
Monitoring, testing, or measuring
C348S185000, C348S189000
Reexamination Certificate
active
07405747
ABSTRACT:
K2T measurement of video signals, regardless of video format, is determined by generating a graticule using an algorithm having a single variable that is a function of the video format for the particular video signal. The graticule is set to a normalized value of one for a range of +/−T, where T is a function of the video format. The graticule is set to a normalized value over a range of +/−(1.5T to flatBreak) according to a human vision masking model algorithm expressed as K+C/t, where K is a constant K factor, t is a function of T, and C is the single variable that is a function of the video format. The normalized value of the graticule beyond a point designated by flatBreak is a constant=K. Finally a linear curve fit between one and K+C/t over the range of +/−(T to 1.5T) sets the remaining values for the graticule.
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Désir Jean W
Gray Francis I.
Ometz David
Tektronix Inc.
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